Concrete construction



Nov. 4 1924- w. J. DVIORAK CONCRETE CONSTRUCTION me/Hinz Nov. 4 1924.

w. J. DVQRAK CONCRETE coNsTRur/mrdN Filed April l0 1923 4 Sheets-Sheet 2Ml g 1W,M

atroz e145 Nov. 4 1924- W. J. DVORAK CONCRETE CONSTRUCTION Filed Aprill0, 1923 4 Sheets-Sheet 5 www @"T @ttm new! 4 sheets-shet 4 gmmro@ W MWw( `W. J. DVORAK CONCRETE CONSTRUCTION Filed April lO Nov. 4 1924- tAm,

Patented Nov. 4, 1924.,

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PATENT CONCRETE CONSTRUCTION.

Application mea april 1o, 1923. semaine. 631,081.

To all whom t may concern.' j

Be it known that I, VENZEL J. DVORAK, citizen of Czechoslovakia,residing at Sunset Heights, in the county of Harris and State of Texas,have invented certain new and useful Improvements in ConcreteConstructions, of which the following is a kspecication. y

This invention relates -to new and useful i0 improvements in concreteconstructiomfand has particular relation to construction which may beerected from concrete slabs. The invention embodies improvements inroof, ceiling and floor construction. y

One object of the .invention resides/inthe provision of an improved typeof concrete construction wherein the slabsemployed are precast and aretied to the supporting beams, or framework, in a novel way, said beamsbeing in the main, cast in place with a` concrete like material while inplastic state.

With the above and other objects Ain view the invention has particularrelation. to certain novel features of construction, arrangement ofparts, and use, an example of which is given in this specification andillustrated in the accompanying drawings, wherein Figure 1 is afragmentary plan view, partly in section, of a roof construction. n

Figure 2 is a longitudinal sectional view thereof, ltaken on the line2-2 of Figure 4, y

Figure 3 is fragmentary transverse cross sectional view taken on theline 3-3 of Figure 1. j Figure 4 is a cross sectional view taken on theline 4 4 of Figure 1.

Figure 5 is a transverse sectional view taken on the line 5 5 ofFigure 1. l

Figure 6 is a fragmentaryv plan view, partly in section, of'a type ofooring employed. Figure 7 is a cross sectional view thereof taken on theline 7-7 of Figure 6. u

Figure 8 is a longitudinal sectional view taken on the line 8-v-8 ofFigure 6.-

Figure 9 is a plan view, partly in section, of another type of tiooringemployed.y

Figure 10 is a transverse sectional view taken on the line 10-10 ofFigure 49.

Figure 11 is a longitudinal sectional view taken on the line 11-11 ofFigure 10.-

Figure 12 shows an edge view of a section of ceiling.

Figure 13 shows a fragmentary plan view thereof, partly in section. .j

Figure l14 shows ,an enlarged j plan view,

partly in section, of `,one of the ceiling slabs able configuration torepresent shingles, tile.y

or the like, as shown in Figure 1. The lower edge of each slab isdesigned to overlap the upper edge of the slab beneath it, as indicatedin Figure 4, and theseoverlapping edges are suitably formedto interlock,one. with the other, and the joint between them is preferably filledAwith pitch or tar 2, so as to form a water tight joint. ,The roof slabsare reinforced, with lengthwise bars or rods 3, whose, ends are formedwith projecting loops asy 4 which project beyond the ends of the slabs.These rods 3 may be wrapped, if desired, with reinforcing wire 5. Inerecting vthe roof the slabs 1 are first placed in theirrequiredpositionin which position they are held byy suitable temporaryframe Jwork embodying forms as 6, which are to be later removed and inwhich the supportingA beams for the roofvare molded, said beamsdesignated by the numerals 7 and 8. Thebeams 7 have the reinforcing rods9 extending through them lengthwise .and at suitable intervals theserods are surrounded by the loops or'ringsO. The projecting loops 4 ofthe 4reinforcing rods 3 overlap in said form andthe intermediate rods 9extend through said overlapping loops as shown in Figuresl and 3. Thesupporting beam? is then poured and when it sets around said reinforcingrods it securely ties the adjacent ends of the slabs, 11`to it. The

-beams y7 alternate with the beams 8, illustrated in Figure 5. Each beam8 has a deep groove 11 formed therein bythe insertion of an insideV-shaped metal form 12, and when the beam is set this groove is filledwith pitch or other water proofing material. This type of beam admits acertain amount of expansion and contraction. Tt is. true that the erpansion and contraction will cause the bottom of the beam to crackslightly, but the ywater proofing material will prevent any leakage. Thereinforcing rods 9 of this beam on eachside are surrounded by the rings13, said rings "beingy located at suitable interformed into loops, theloops of adjacent ends of the slabs overlapping, reinforcing rodsextending through said overlapping loops, concrete beams poured While ina plastic state around said loops and the rods projecting through theloops, said rods and loops reinforcing said beams, alternative beamshaving deep lengthwise grooves along their upper sides, and Waterproofing material filling said grooves.

5. A concrete construction including substantially rectangular slabs,reinforcing rods embedded in said slabs, and Whose ends projecttherefrom, said projecting ends being formed into loops, the loops ofadjacent slab ends overlapping, tie rods through said overlapping loops,concrete beams poured While in a plastic state around said loops in tierods, and supporting the ends of said slabs, said loops and tie rodsforming reinA forcements for said beams, ring like ties surrounding saidtie rods and embedded in saidk WENZEL J. DVORAK. Witnesses E. V.HARDWAY, W. I-I. DUNLAY.

